Power distribution network-based control method for grounding failure suppression device

Abstract

The embodiment of the disclosure discloses a power distribution network-based control method for a grounding failure suppression device. The method is used for acquiring an optimal injection current parameter and injecting corresponding injection current into a neutral point of a power distribution network to suppress single-phase grounding failure voltage and failure current. The method of the embodiment of the invention comprises the following steps: determining a phase reference value and an amplitude reference value of corresponding injection current when measured failure phase voltage is minimum, and then injecting the corresponding injection current according to the phase reference value and the amplitude reference value. According to the method, a control process is simplified, and complex detection of multiple parameters is eliminated; the reference values of the injection current are acquired, thereby controlling injection of the corresponding current to realize rapid arc extinction of a grounding failure of the power distribution network.

Description

technical field [0001] The invention relates to the field of arc suppression for single-phase ground faults in distribution networks, in particular to a control method for a ground fault suppression device based on distribution networks. Background technique [0002] As the terminal part of the power system, the safe and stable operation of the distribution network is directly related to the quality of electricity for the majority of users. However, the operating environment of the distribution network is complex and changeable, and various random faults are prone to occur. Among them, the single-phase ground fault is the most severe and most frequent fault in the distribution network. At present, in order to suppress the fault current and prevent the generation of grounding arc, the distribution network in my country more often chooses the neutral point to be grounded through the arc suppression coil. [0003] At present, there are generally methods for fault arc suppressi...

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Problems solved by technology

[0004] However, this injection current method has extremely high requirements on the control performance of the device, and it is necessary to accurately adjust the phase and amplitude of the injection current in real time.

However, since the injection current reference value is related to the parameters of the distribution network to the ground, it is not only very complicated, but also difficult to obtain. Therefore, there is currently no very effective method for the control of the injection current in the industry.

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